According to PW, Penguin Young Readers confirmed Dial Books for Young Readers is shuttered, with layoffs and internal moves across the division. Industry sources cited in the piece describe editors shifting to G. P. Putnam's Sons Books for Young Readers while some staff exit, including leadership roles at Dial.
Dial's history matters because it was a sizable annual list across age bands. For authors and illustrators, imprint closures like this usually mean contract and catalog questions - who inherits editorial relationships, how backlist gets handled, and what happens to scheduled titles - long after the headline news cycle moves on.
(Shortened and summarised to avoid devaluing the source)